Duplex gage-cock.



Patented Mar. 16, 1909.

. '"wunlll F. KOBLER.

DUPLEX GAGE GOGK.

APPLICATION FILED 00T. 29,1908.

FREMONT KOBLER, OF CHIHUAHUA, MEXICO.

DUPLEX GAGE-COCK.

Specicaton of Letters Patent.

Patented March 16, 1909.

Application filed October 29, 1908. Serial No. 460,173.

To all whom it may concern.'

Beit known that I, F REMONT Konten, a citizen of the United States, residing at Chihuahua, in the State of Chihuahuaand Republic of Mexico, have invented certain new and useful Improvements in Duplex GageeCocks, of which the following is a specification.

The present invention is in the nature of a duplex gage cock and has for its primary object to provide a device of this character which can be readily applied to a boiler or like member and in which one of the valves is normally forced toward its seat by means of the steam ressure within the boiler so as to obviate all) likelihood of either steam or hot water escaping in such quantities as to scald or injure the operator.

The invention further contemplates a gage cock which is simple and inexpensive in its construction, can be readily immipulated, and will not become clogged by mud or sediment when in use.

For a full understanding' of the invention and the merits thereof and also to acquire a knowledge of the details of construction and the means for effecting the result, reference is to be had to the followingI description and accompanying drawings, in which:

Figure l is a side elevation of a gage cock embodying the invention, Fig. 2 is a longitudinal sectional view through the same, Fig. 3 is a side elevation of the outer valve, Fig. 4 is an end view thereof, Fig. 5 is an end kview of the inner valve, and Fig. 6 is a side elevation of the inner valve.

Corresponding and like parts are referred to in the following Vdescription and indicated in all the views of the drawings by the same reference characters.

Referring to the drawing, the numeral l designates -a tubular stock which is substantially cylindrical in shape and is threaded at both ends upon its exterior. One end of the stock is adapted to be screwed within an opening in the side of a boiler' or like member, while the opposite end has a cap 2 applied thereto. lt may be noted that in the present instance, the middle portion of the tubular stock is enlarged, the said enlargement serving to limit the amount the stock can be screwed into the boiler andl also engaging the cap to insure a tight connection with the said member. A nipple 3 which is designed to be connected to the gage, is applied to one side of the cap which is formed with an internally threaded opening arranged in alinement with the bore of the stock. A sleeve 4 is fitted within this opening in the cap and the portion of the sleeve projecting outwardly beyond the cap is formed with an integral collar Ll1L having a handle 5 secured thereto by any suitable means such as the screws 6.

Fassing loosely through the tubular stock and the sleeve 4, is a stem 7 which is prok vided at an intermediate point in its length with an integral collar or enlargement 8 n ormally located within the cap 2. Fitted over the stein 7 and bearing against this enlargement 8, is a valve 9 designed to engage the outer end of the tubular stock which projects within the cap 2. This valve 9 is formed with a valve stem 921 which fits within the tubular stock and serves to guide the valve in its movements, the said valve stem being fluted to admit of the passage of the steam around the same. A second valve l() which faces in an opposite direction to the valve 9 and is designed to engage the inner end ofthe stock l, is also fitted upon the stem 7 and is also provided with a valve stem l()a similar in construction to the valve stem 9a. A pair of nuts ll which are threaded upon the inner ends of the stem 7 serve to retain the two valves 9 and l() in position upon the stem, the valve l() carrying a tubular exten sion 10b which abuts against the valve stem 9a and serves to hold the valve 9 against the enlargement 8. The distance between the two valves 9 and 10 is slightly greater than the length of the tubular stock so that one of the valves is closed when the opposite valve is open, and vice versa. Attention may here be directed to the fact that the valves have flat seats which last much longer than conical seats.

The pressure within the boiler normally tends to hold the valve l0 upon its seat, but by grasping the handle 5 and screwing the sleeve 4- inward, the inner end of the sleeve may be caused to engage the valve 9 so as to force it upon its seat and hold the valve l0 in open position. The sleeve 4 turns independently of the stem 7 so that there is no rotary motion of the valves such as would cause the valves and valve seats to become cut. A packing nut 12 is applied to the outer end of the sleeve 4 and engages the stem 7 to prevent any steam or hot water passing around the stem and soalding the hand when operating the gage cock. Attention is directed to the fact that the cap 2 together with all attaehed parts ean be readily removed with pressure in the boiler so that if by aeeident the gage eeek should beeeme broken -eil at the boiler there would be a prob ability ef the inner valve 10 being thrown upon its seat by the boiler pressure and preventing the steam and water escaping and injuring the men in charge.

Having thus described the invention, what is claimed as new is:

1. In a gage eeek, the combination ef a tubular steek, a eap applied te the steek, a stem passing loosely through the steek, and valves Carried by the stem for engaging eppesite ends ef the steek, the distance between the valves being greater than the length ef the steek se that ene of the valves is open Iwhen the opposite valve is elesed.

2. ln a gage eeek, the combination ef a tubular steek, a eap applied to the steek, a stem passing loosely through the steek, and valves earried by the stem for engaging opposite ends of the steek, the said valves being provided with fluted valve stems which operate Within the steek and the distanee between the valves being greater than the length ef the steek se that one valve is open while the opposite valve is elesed.

3. ln a gage eeek, the combination of a l tubular steek formed at its end portions With valve seats, a stem passing loosely through the steek and formed with an enlarged portion, a valve iitted upon the stem and abutting against the enlarged portion, a second. valve fitted upon the stem and provided with an extension for engaging the first mentioned valve te hold it against the enlargement, the said valves being adapted to eoperate with the before mentioned valve seats, and means for helding the valves in position upon the stern.

1l. In a gage eoek, the combination of a tubular steek, provided at its end portions with valve seats, a eap applied te the steek, a sleeve threaded within the eap and arranged in alinement with the bere of the steek, a stem passing loosely through the steek and also through the sleeve, valves carried by the stein for cooperation with the before mentioned valve seats, and means for turning the sleeve te Control the valves.

5. In a gage eeek, the combination ef a tubular steek provided at its ends with valve seats, a eap applied te the tubular steek, a sleeve threaded within the eap and arranged in alinement with the bores of the steek, a stem passing loosely through the steek and the sleeve, a pair ef eppesitely faeing valves carried by the stem and designed to eeperate with the valve seats, the distance between the valves being greater than the distance between the valve seats se that one ef the valves is open while the opposite valve is elosed, and means fer turning the sleeve te eentrel the valves.

6. In a gage eeek, the combination of a tubular steek, provided with a pair of valve seats, a eap applied te one end ef the tubular steek, a sleeve threaded within the eap and arranged in alinement with the bore of the steek, a stem passing loosely through thesteek and the sleeve and formed with an enlargement engaged by the sleeve, a pair ef oppositely facing valves carried by the stein and cooperating with the valve seats, the distance between the valves being greater than the distance between the valve seats se that one of the valves is open while the opposite valve is closed and the steam pressure within the boiler normally tending to move the stem in one direction to elese ene of the valves, and means for turning the sleeve te move the stem in the opposite direetien.

ln testimony whereof l aHiX my signature in presence of two witnesses.

FREMONT KOBLER.

Vitnesses Giras F. STURTEVANT, GAsToN DE GAUGUE. 

